<template>
  <scroll class="suggest"
          :data="result"
          :pullup="pullup"
          :beforeScroll="beforeScroll"
          @scrollToEnd="searchMore"
          @beforeScroll="listScroll"
          ref="suggest"
  >
    <ul>
      <li class="suggest-list"
          v-for="item in result"
          :key="item.mid"
          @click="selectItem(item)"
      >
        <div class="icon">
          <i :class="getIconCls(item)"></i>
        </div>
        <div class="name">
          <p class="text" v-html="getDisplayName(item)"></p>
        </div>
      </li>
      <loading v-show="hasMore" title=""></loading>
    </ul>
    <div class="no-result-wrapper" v-show="!hasMore && !result.length">
      <no-result title="抱歉，暂无搜索结果"></no-result>
    </div>
  </scroll>
</template>

<script type="text/ecmascript-6">
import { search } from 'api/serach'
import { ERR_OK } from 'api/config'
import { createSong } from 'common/js/song'
import Scroll from 'base/scroll/scroll'
import Loading from 'base/loading/loading'
import Singer from 'common/js/singer'
import { mapMutations, mapActions } from 'vuex'
import NoResult from 'base/no-result/no-result'

const TYPE_SINGER = 'singer'
const perpage = 20

export default {
  props: {
    query: {
      type: String,
      default: ''
    },
    showSinger: {
      type: Boolean,
      default: true
    }
  },
  data () {
    return {
      page: 1,
      result: [],
      pullup: true,
      hasMore: true,
      beforeScroll: true
    }
  },
  methods: {
    search () {
      this.page = 1
      this.$refs.suggest.scrollTo(0, 0)
      this.hasMore = true
      search(this.query, this.page, this.showSinger, perpage).then((res) => {
        if (res.code === ERR_OK) {
          this.result = this._genResult(res.data)
          this._checkMore(res.data)
        }
      })
    },
    searchMore () {
      if (!this.hasMore) {
        return false
      }
      this.page++
      search(this.query, this.page, this.showSinger, perpage).then((res) => {
        if (res.code === ERR_OK) {
          this.result = this.result.concat(this._genResult(res.data))
          this._checkMore(res.data)
        }
      })
    },
    getIconCls (item) {
      if (item.type === TYPE_SINGER) {
        return 'icon-mine'
      } else {
        return 'icon-music'
      }
    },
    getDisplayName (item) {
      if (item.type === TYPE_SINGER) {
        return item.singername
      } else {
        return `${item.name}-${item.singer}`
      }
    },
    selectItem (item) {
      if (item.type === TYPE_SINGER) {
        const singer = new Singer({
          id: item.singermid,
          name: item.singername
        })
        this.$router.push({
          path: `/search/${singer.id}`
        })
        this.setSinger(singer)
      } else {
        this.insertSong(item)
      }
      this.$emit('select')
    },
    listScroll () {
      this.$emit('listScroll')
    },
    refresh () {
      this.$refs.suggest.refresh()
    },
    _checkMore (data) {
      const song = data.song
      if (!song.list.length || (song.curnum + song.curpage * perpage) >= song.totalnum) {
        this.hasMore = false
      }
    },
    _genResult (data) {
      let ret = []
      if (data.zhida && data.zhida.singerid) {
        ret.push({...data.zhida, ...{type: TYPE_SINGER}})
      }
      if (data.song) {
        ret = ret.concat(this._normalizeSongs(data.song.list))
      }
      return ret
    },
    _normalizeSongs (list) {
      let ret = []
      list.forEach((musicData) => {
        if (musicData.songid && musicData.albumid) {
          ret.push(createSong(musicData))
        }
      })
      return ret
    },
    ...mapMutations({
      setSinger: 'SET_SINGER'
    }),
    ...mapActions([
      'insertSong'
    ])
  },
  watch: {
    query () {
      this.search()
    }
  },
  components: {
    Scroll,
    Loading,
    NoResult
  }
}
</script>

<style scoped lang="stylus" type="text/stylus">
@import "~common/stylus/variable"
@import "~common/stylus/mixin"

.suggest
  height: 100%
  overflow: hidden
  .suggest-list
    display: flex
    padding: 10px 30px
    .suggest-item
      display: flex
      align-items: center
      padding-bottom: 20px
    .icon
      flex: 0 0 30px
      width: 30px
      [class^="icon-"]
        font-size: 14px
        color: $color-text-d
    .name
      flex: 1
      font-size: $font-size-medium
      color: $color-text-d
      overflow: hidden
      .text
        no-wrap()
  .no-result-wrapper
    position: absolute
    width: 100%
    top: 50%
    transform: translateY(-50%)
</style>
